Add required_prerequisites to program API (#2419)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

courses/serializers/v2/programs.py

@@ -24,6 +24,7 @@ class ProgramSerializer(serializers.ModelSerializer):
     departments = DepartmentSerializer(many=True, read_only=True)
     topics = serializers.SerializerMethodField()
     certificate_type = serializers.SerializerMethodField()
+    required_prerequisites = serializers.SerializerMethodField()
 
     def get_courses(self, instance):
         return [course[0].id for course in instance.courses if course[0].live]
@@ -34,6 +35,16 @@ def get_requirements(self, instance):
             "electives": [course.id for course in instance.elective_courses],
         }
 
+    def get_required_prerequisites(self, instance):
+        """
+        Check if the prerequisites field is populated in the program page CMS.
+        """
+        return bool(
+            hasattr(instance, "page")
+            and hasattr(instance.page, "prerequisites")
+            and instance.page.prerequisites != ""
+        )
+
     def get_req_tree(self, instance):
         req_root = instance.get_requirements_root()
 
@@ -83,6 +94,7 @@ class Meta:
             "end_date",
             "enrollment_start",
             "enrollment_end",
+            "required_prerequisites",
         ]
 
 

courses/serializers/v2/programs_test.py

@@ -24,16 +24,25 @@
 @pytest.mark.parametrize(
     "certificate_type", ["MicroMasters Credential", "Certificate of Completion"]
 )
+@pytest.mark.parametrize("prerequisites", ["program prerequisites", None, ""])
 def test_serialize_program(
     mock_context,
     remove_tree,
     certificate_type,
+    prerequisites,
     program_with_empty_requirements,  # noqa: F811
 ):
     """Test Program serialization"""
     if certificate_type == "MicroMasters Credential":
         program_with_empty_requirements.program_type = "MicroMasters®"
         program_with_empty_requirements.save()
+
+    required_prerequisites = False
+    if prerequisites is not None:
+        program_with_empty_requirements.page.prerequisites = prerequisites
+    if prerequisites != "":
+        required_prerequisites = True
+
     run1 = CourseRunFactory.create(
         course__page=None,
         start_date=now() + timedelta(hours=1),
@@ -95,5 +104,6 @@ def test_serialize_program(
             "end_date": program_with_empty_requirements.end_date,
             "enrollment_start": program_with_empty_requirements.enrollment_start,
             "enrollment_end": program_with_empty_requirements.enrollment_end,
+            "required_prerequisites": required_prerequisites,
         },
     )